koshigaya natsumi
A main character from Non Non Biyori. Voiced by Sakura Ayane.
She has blue eyes, and brown/orange hair with a short ponytail. She also wears the Asahigaoka school uniform when attending school. She's taller than her very short older sister Koshigaya Komari, but shorter than the younger but overdeveloped Ichijou Hotaru.
She is a bad student and a troublemaker compared to her more straight-laced sister. She's more emotionally mature than the easily upset Komari, but is childishly irresponsible and often acts lazy. She often pesters her older sister and sometimes treats her like a child; however, deep down she still respects her older sister.
Like Miyauchi Renge, she sometimes calls Komari "Koma-chan"; however, this is generally intended as pestering. Normally she simply calls Komari "onee-chan".
In season one it's revealed that she used to have a childhood crush on her older brother Koshigaya Suguru.
与她更直截了当的妹妹相比，她是个坏学生，也是麻烦制造者。她在情感上比容易沮丧的科马利更加成熟，但幼稚的不负责任，而且经常懒惰。她经常为姐姐缠住她，有时像孩子一样对待她。但是，深处她仍然尊重姐姐。
像Miyauchi Renge一样，她有时将Komari称为“ Koma-chan”。但是，这通常是缠扰的。通常，她只是称Komari为“ One-chan”。
在第一季中，她曾经曾经对自己的哥哥Koshigaya Suguru感到迷恋。